JPH07241600A - Dehydration treatment apparatus for sludge - Google Patents

Abstract

PURPOSE:To reduce such a phenomenon that sludge is bonded to a blade to remain thereon by forming rectangular blades to the annular surface going toward a feed direction from the inlet side of the inner peripheral surface of a rotary drum so as to incline the same downwardly in the feed direction and successively shifting the positions of the blades of the annular surface toward the feed direction in a rotary direction. CONSTITUTION:Two blades 50a, 50b are formed on to the annular surface 50 on the inlet side of the inner peripheral surface of a rotary drum 1, for example, at a 180 deg. interval and downwardly inclined at an angle of 25 deg. in a feed direction S. Blades 51a, 51b having the same shape as the blades 50a, 50b are formed on the next annular surface 51 adjacent to the annular surface 50 so as to be shifted, for example, by 45 deg. in a rotary direction. The sludge sent to the annular surface 50 on the inlet side of the rotary drum 1 is scraped up by the first blades 50a, 50b and upwardly revolved to fall on the next annular surface 51 to be scraped up by the blades 51a, 51b and upwardly revolved to fall on the next annular surface 52. By this constitution, sludge is sent under stirring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge dewatering apparatus in which an organic sludge and a modifying and solidifying agent are put into a rotary drum and dehydrated and dried.

[0002]

2. Description of the Related Art In a conventional sludge dewatering apparatus, a screw is provided in a rotary drum, or a stirring blade is provided in a spiral shape on an inner peripheral surface of the rotary drum to spirally sludge the sludge flowing into the rotary drum. It was stirred with the blades arranged in a line, and was put on the blade and sent forward.

[0003]

DISCLOSURE OF THE INVENTION In the above prior art,
The former had a problem that the sludge clung to the screw and the feeding was insufficient, so that the entire sludge in the rotary drum could not be uniformly stirred. The latter has a problem that the sludge fed on the blade is easily attached to the blade and does not fall sufficiently because the blade is relatively long, and thus the stirring and feeding is insufficient. The present invention aims to solve the above problems.

[0004]

In order to achieve the above-mentioned object, the present invention has a sludge charging hopper and a reforming and solidifying agent charging hopper arranged on the rotary drum inlet side, and a discharge screw arranged on the outlet side. In a sludge dewatering device in which a stirring blade and a screw blade are fixed to the inner peripheral surface of the rotating drum, at least two rectangular blades are fed to the annular surface facing the feeding direction from the inlet side of the inner surface of the rotating drum. Direction, the blades of each annular surface are sequentially displaced in the direction of rotation, and the sludge is picked up by the blades on the front annular surface. Is dropped onto the next annular surface and fed, the blades on the annular surface are used to stir the next stirring, and the blades on the annular surface in the feeding direction are sequentially used to lift and feed it forward. To do.

[0005]

Embodiments will be specifically described below based on the illustrated embodiments. Reference numeral 1 is a rotary drum, and rings 5 and 6 of the rotary drum 1 are mounted on wheels 3 and 4 arranged on a base 2 in the front and rear. The front plate 7 of the rotary drum 1 is provided with a circular hole 8 concentric with the rotary drum shaft, and an outlet fixing plate 9 is abutted and sealed in the circular hole 8. 10 is a pulley integrated with the front side plate 7, which is a base 2
A belt 11 is driven by a motor 11 provided in the. The outlet fixing plate 9 is a gutter 13 that connects the inside of the rotary drum 1 to the outside, and a discharge screw 14 is arranged. A belt 16 is provided by a forward / reverse rotation motor 15 provided on the base 2.
It is designed to be driven by. Reference numeral 18 denotes a rear side plate of the rotary drum 1, which is provided with a circular hole 19 concentric with the rotary drum shaft, and an inlet fixing plate 20 is abutted and sealed in the circular hole 19. Reference numeral 21 is a sludge charging hopper, and 22 is a sludge charging screw, the shaft tip of which projects from the opening 40 of the inlet fixing plate 20 and is supported by a bearing 42 at the tip of an arm 41 fixed to the inlet fixing plate 20. 23 is a well-known modified solidifying agent feeding hopper,
Reference numeral 24 denotes a reforming and solidifying agent feeding screw, the shaft tip of which projects from the opening 40 of the inlet fixing plate 20 and is supported by a bearing 45 at the tip of an arm 44 fixed to the inlet fixing plate 20. Base 2
The motors 25 and 26 provided above are driven by belts 27 and 28. Reference numeral 29 denotes an opening / closing lid of the rotary drum 1. Reference numeral 46 denotes a scraping plate arm whose base is fixed to the inlet fixing plate 20 and is arranged obliquely downward. At the tip end, the inlet side inner end surface peripheral portion 1a of the rotating drum 1 and the inlet side inner peripheral surface corner are shown in the right direction of the arrow. Sides 47a, 47b that abut on the peripheral portion 1b
A scraping plate 47 having a square shape is fixed.

[0006] The inlet side annular surface 50 of the inner peripheral surface of the rotating drum 1.
Two blades 50a and 50b are provided at an interval of 180 °. Each of the blades 50a and 50b has a rectangular shape and a width of 22.
The height is 0 mm and the height is 240 mm, and the height is longer than the width, and it is inclined downward by 25 ° in the feeding direction S. The next annular surface 51 adjacent to the annular surface 50 has the same shape 2 as above.
The blades 51a and 51b project from the blades 50a and 50b while being offset by 45 ° in the rotational direction. First blade 50
The a and 50b and the second blades 51a and 51b are overlapped by about 30 mm. In this manner, the blades 52a, 52b, 53a, 53b, 54a, 5 are sequentially formed on the annular surfaces 52, 53, 54, 55, 56, 57 in the feeding direction in the same manner as described above.
4b, 55a, 55b, 56a, 56b, 57a, 57
b is projected.

As a result, the adjacent annular blades 50a,
51a, 52a, 53a, 54a, 55a, 56a, 5
7a and blades 50b, 51b, 52b, 53b, 54
b, 55b, 56b and 57b are arranged obliquely in the feeding direction. Four discharge blades 58a, 58b, 58c, 58d are provided on the last annular surface 58 of the rotary drum 1 so as to project in parallel with the feed direction S.

Next, the operation will be described. Sludge from the sludge charging hopper 21 is continuously charged into the rotary drum 1 from the opening 40 of the inlet fixing plate 20 by the sludge charging screw 22 rotated by the motor 25, and cement or lime-based from the reforming and solidifying agent charging hopper 23. The reforming and solidifying agent is a reforming and solidifying agent feeding screw 24 rotated by a motor 26.
Thus, it is continuously charged into the rotary drum 1 through the opening 40 of the inlet fixing plate 20.

Air is also sent in by a device (not shown). The rotary drum 1 is rotating in the right direction of the arrow. The sludge and the reforming solidifying agent that have fallen into the rotating drum 1 generate heat when they first meet and are in a state where they are most likely to adhere, and the inlet-side inner end surface peripheral portion 1a and the inlet-side inner peripheral surface corner peripheral portion 1b of the rotating drum 1 are in contact. Attached to the sides 47a, 47 of the scraping plate 47.
b is scraped from below and dropped into the rotary drum 1. In this way, the sludge and the reforming solidifying agent are not deposited on the inlet inner end surface and the inner peripheral surface corner of the rotary drum 1.

The rotating drum 1 is 5 to 10
It is rotating at r.p.m. The sludge fed to the inlet side annular surface 50 of the rotary drum 1 is scraped up by the first blades 50a and 50b. Since the blades 50a and 50b are inclined downward in the feeding direction S, the blades 50a and 50b rotate upward and drop on the next annular surface 51. Then, the blades 51a and 51b projectingly provided on the annular surface 51 raise the blades, and the blades 51a and 51b rotate upward as described above, and fall to the next annular surface 52. In this way, the sludge is sequentially lifted up one after another on the annular surface in the feeding direction, dropped, stirred, and fed.

During this time, the blades are not forced in the flow of sludge flowing into the rotary drum 1 and are pushed up by this flow to scrape up the sludge and push it forward, so that the sludge on the blades adheres little and surely. Fall forward. Therefore, the sludge is well agitated, and the soft sludge is in a dry state when it is discharged and when it is discharged. The blade inclination angle, the number of blades, etc. can be changed according to the property of the sludge.

[0012]

According to the present invention, a sludge charging hopper and a reformer / solidifying agent charging hopper are arranged on the rotary drum inlet side, a discharge screw is arranged on the outlet side, and a stirring blade and a screw are provided on the inner peripheral surface of the rotary drum. In a sludge dewatering apparatus with fixed blades, at least two rectangular blades are inclined downward by a predetermined angle in the feed direction on an annular surface facing the feed direction from the inlet side of the inner surface of the rotary drum. Protrudingly, the blades of each annular surface are sequentially arranged in the rotational direction by shifting their positions in the direction of feed, and sludge is scraped up by the blades of the annular surface on the front side and then dropped and fed to the next annular surface, The blades of the annular surface are used to stir the next to stir, and the blades of the annular surface in the feed direction are sequentially scraped and fed forward, so the sludge flowing into the rotating drum flows not by force. Agitate with a blade in the Since the sludge on the root is pushed by the flow and falls forward, the sludge rarely adheres and remains on the blades, and the entire sludge is reliably agitated and sent to the front, and when the inflow is soft and the sludge is discharged, it is made into a smooth state. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a rotary drum portion of the entire apparatus of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view of an inner end surface, an inner peripheral surface and a scraping plate portion of the rotary drum of FIG.

FIG. 4 is a development view of the rotary drum of FIG.

FIG. 5 is a blade front view.

FIG. 6 is a side view of the blade of FIG.

[Explanation of symbols]

1 rotary drum 2 base 50, 51, 52, 53, 54, 55, 56, 57
Annular surface 50a, 51a, 52a, 53a, 54a, 55a, 5
6a, 57a Blades 50b, 51b, 52b, 53b, 54b, 55b, 5
6b, 57b blades 58a, 58b, 58c, 58d discharge blades

Claims (4)

[Claims] 1. A sludge charging hopper and a reforming and solidifying agent charging hopper are arranged on the rotary drum inlet side, a discharge screw is arranged on the outlet side, and a stirring blade and a screw blade are fixed to the inner peripheral surface of the rotary drum. In the sludge dewatering apparatus, at least two rectangular blades are provided so as to project downward at a predetermined angle in the feed direction on an annular surface facing the feed direction from the inlet side of the rotary drum, The blades of each annular surface are sequentially arranged in the rotational direction as they move in the feeding direction, and the sludge is picked up by the blade of the front annular surface and then dropped to the next annular surface and fed. A sludge dewatering device that is picked up with a blade and then stirred, and then sequentially picked up with an annular blade in the feed direction and fed forward. 2. The sludge dewatering apparatus according to claim 1, wherein the height of the rectangular blade is longer than the width of the blade. 3. The sludge dewatering apparatus according to claim 1, wherein the blades are arranged in a substantially oblique shape in the feed direction. 4. An arm base portion is fixed to a rotary drum inlet side fixing plate, and a scraping plate is fixed to the tip of the arm so as to abut on the inlet side inner end surface peripheral portion and the inner peripheral surface corner peripheral portion. The sludge dewatering apparatus according to 1.